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Increased risk of mortality associated with use of ipratropium and theophylline in COPD patients

Lee TA, Pickard AS, Bartle B, Schmock GT, Weiss KB. Increased risk of mortality associated with use of ipratropium and theophylline in COPD patients. Poster session presented at: American Thoracic Society Annual International Conference; 2007 May 1; San Francisco, CA.

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